Noise and Decoherence in Quantum Two-Level Systems
... Thus we reproduce Eq. (9) with the dephasing rate Γϕ given by (12) in the limit θ = 0. This result is easy to understand at the Golden rule level. Pure dephasing processes are associated with transitions during which only the oscillators change their state, while the spin remains unchanged. Since no ...
... Thus we reproduce Eq. (9) with the dephasing rate Γϕ given by (12) in the limit θ = 0. This result is easy to understand at the Golden rule level. Pure dephasing processes are associated with transitions during which only the oscillators change their state, while the spin remains unchanged. Since no ...
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... particular type of non-Hermitian Hamiltonians with real spectra was brought forward in quantum mechanics [5]. These Hamiltonians were invariant under space-time reflection, received the name of P T -symmetric and opened new avenues of research in quantum mechanics, as well as other areas of physics ...
... particular type of non-Hermitian Hamiltonians with real spectra was brought forward in quantum mechanics [5]. These Hamiltonians were invariant under space-time reflection, received the name of P T -symmetric and opened new avenues of research in quantum mechanics, as well as other areas of physics ...
Spin-orbit coupling in superconductor-normal metal
... (SNS) junctions in the presence of an exchange field. We adopt the quasiclassical Green’s function approach and implement the Rashba SO interaction into the Usadel equation, which is the equation of motion for the quasiclassical Green’s functions. We solve the Usadel equation numerically as the anal ...
... (SNS) junctions in the presence of an exchange field. We adopt the quasiclassical Green’s function approach and implement the Rashba SO interaction into the Usadel equation, which is the equation of motion for the quasiclassical Green’s functions. We solve the Usadel equation numerically as the anal ...
Interplay of driving, nonlinearity and dissipation in nanoscale and ultracold atom systems
... are frozen due to a gap larger than the chemical potential in the corresponding excitation spectrum. In some systems, e.g. quantum dots, SQUIDs, flux and charge qubits, only a discrete number of degrees of freedom determine the observables of interest. One refers to such systems as zero-dimensional ...
... are frozen due to a gap larger than the chemical potential in the corresponding excitation spectrum. In some systems, e.g. quantum dots, SQUIDs, flux and charge qubits, only a discrete number of degrees of freedom determine the observables of interest. One refers to such systems as zero-dimensional ...
Master Thesis
... Physics consists in the effort to reduce and translate natural phenomena to the language of mathematics through the observation of empirical evidence. To achieve that, we build mathematical models, with which we are able to predict, describe and understand nature. And then, in order to corroborate t ...
... Physics consists in the effort to reduce and translate natural phenomena to the language of mathematics through the observation of empirical evidence. To achieve that, we build mathematical models, with which we are able to predict, describe and understand nature. And then, in order to corroborate t ...
Nonlinear Susceptibilities of Donor
... and assumes that the stationary Hartree-Fock ground state IYHF)is a good approximation for the real ground state. It proceeds to calculate the excited states by exciting one electron out of the occupied orbitals, and the excited state is represented by a linear combination of the single electron exc ...
... and assumes that the stationary Hartree-Fock ground state IYHF)is a good approximation for the real ground state. It proceeds to calculate the excited states by exciting one electron out of the occupied orbitals, and the excited state is represented by a linear combination of the single electron exc ...
A Mathematical Characterization of the Physical Structure of Observers
... the temptation mentioned is avoided. It has to be because the states collapsed to are observer-dependent and neither unique nor globally defined. There remains a universal background state (denoted by ω). Individual observers collapse the sequences of locally-defined states that form their “worlds” ...
... the temptation mentioned is avoided. It has to be because the states collapsed to are observer-dependent and neither unique nor globally defined. There remains a universal background state (denoted by ω). Individual observers collapse the sequences of locally-defined states that form their “worlds” ...
Toward a scalable, silicon-based quantum computing architecture
... never occur. Furthermore, if a subset of the qubits in a system is measured, the remaining qubits are left in a state consistent with the measurement. Since measurement of a quantum system only produces a single result, quantum algorithms must maximize the probability that the result measured is the ...
... never occur. Furthermore, if a subset of the qubits in a system is measured, the remaining qubits are left in a state consistent with the measurement. Since measurement of a quantum system only produces a single result, quantum algorithms must maximize the probability that the result measured is the ...
Exact quantum query complexity
... We present some new examples of total boolean functions f such that QE (f ) is a constant multiple of D(f ) (between 1/2 and 2/3). We show that these separations cannot be obtained by just computing parities of pairs of bits. These separations are based on concatenating small separations found for f ...
... We present some new examples of total boolean functions f such that QE (f ) is a constant multiple of D(f ) (between 1/2 and 2/3). We show that these separations cannot be obtained by just computing parities of pairs of bits. These separations are based on concatenating small separations found for f ...
Isotropic restriction in Group Field Theory condensates
... built using functions of holonomies on graphs embedded in Σ. We implement the three constraints one after another to obtain the physical Hilbert space Hphys . Kinematical Hilbert Space. The basic elements of the kinematical Hilbert space Hkin are functions of holonomies defined on oriented graphs em ...
... built using functions of holonomies on graphs embedded in Σ. We implement the three constraints one after another to obtain the physical Hilbert space Hphys . Kinematical Hilbert Space. The basic elements of the kinematical Hilbert space Hkin are functions of holonomies defined on oriented graphs em ...
On the adequacy of the Redfield equation and related approaches
... to a phonon bath. Their discussions are, however, applicable to nontransfer processes such as spin relaxation and vibrational relaxation problems. In the EET process, each site of a multichromophoric array is coupled to its local environmental phonons. In such systems, electronic de-excitation of a ...
... to a phonon bath. Their discussions are, however, applicable to nontransfer processes such as spin relaxation and vibrational relaxation problems. In the EET process, each site of a multichromophoric array is coupled to its local environmental phonons. In such systems, electronic de-excitation of a ...
Quantum Computing
... since 2004 in Massachusetts, USA. 4.The world's first computer network protected by quantum key distribution was implemented in October 2008, at a scientific conference in Vienna. SECOQC (Secure Communication Based on Quantum Cryptography) used 200 km of standard fibre optic cable to interconnect si ...
... since 2004 in Massachusetts, USA. 4.The world's first computer network protected by quantum key distribution was implemented in October 2008, at a scientific conference in Vienna. SECOQC (Secure Communication Based on Quantum Cryptography) used 200 km of standard fibre optic cable to interconnect si ...
QUANTUM GROUPS AND DIFFERENTIAL FORMS Contents 1
... Here |u| is the degree of u with respect to the grading on Ω(Aq ). Though d2 is zero on the generators xi , we cannot conclude d2 = 0. This is because the Leibniz rule has been skewed by the parameter s rather than the usual (−1). Note that setting q = s = 1, gives us the basic object Ω(A) in Defini ...
... Here |u| is the degree of u with respect to the grading on Ω(Aq ). Though d2 is zero on the generators xi , we cannot conclude d2 = 0. This is because the Leibniz rule has been skewed by the parameter s rather than the usual (−1). Note that setting q = s = 1, gives us the basic object Ω(A) in Defini ...
Macroscopic Quantum Effects in Biophysics and
... its universality was raised, i.e. the question of general validity of the quantum-physical laws for macroscopic phenomena as well, usually treated by the methods of classical physics. In the history of quantum physics, and especially quantum mechanics, this question has been temporarily put aside fo ...
... its universality was raised, i.e. the question of general validity of the quantum-physical laws for macroscopic phenomena as well, usually treated by the methods of classical physics. In the history of quantum physics, and especially quantum mechanics, this question has been temporarily put aside fo ...